nostr:nevent1qgs0g2szz5srzkgdesaq5e7m2yckkum9ujh0xj4majtpnsfw3rcqddgqyz30sm546xg9vsgcvxgye9d9h5v4g0chdxe4fpn9vlzvq9xw7k0xgm7xpaa

Did you import your notes from the network? Do you mean the Mac app; or in development web app? Thank you for testing!

A relay only serves events it actually received, so one that joined later never had those older notes. History in Nostr lives per relay rather than per app, and a timeline stopping about a year back is usually the relay answering EOSE with nothing more to give. Compare the relay lists before blaming...